Abdominal muscle training apparatus



FIG. 1 is a perspective view of an abdominal muscle training apparatus, showing my new design in a bent state;

FIG. 2 is a front elevation view thereof, in a flattened state;

FIG. 3 is a rear elevation view thereof, in a flattened state;

FIG. 4 is a left side elevation view thereof, in a flattened state; and,

FIG. 5 is a right side elevation view thereof, in a flattened state.

The indicia or broken lines shown on the figures are for illustrative purposes only and are hereby disclaimed as forming no part of Applicant's claimed invention. 

The ornamental design for a abdominal muscle training apparatus, as shown and described. 